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Automatic choke

一种阻风门、自动的技术，应用在装料系统、发动机元件、发动机控制等方向，能够解决温度变化响应性差、时键延迟、很多时间等问题，达到提高起动效率、抑制空燃比降低的效果

Inactive Publication Date: 2005-09-14
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem as follows: due to the poor response of bimetallic materials to temperature changes, in either case after a cold start or after restarting at a high engine temperature, the timing of throttle release is delayed, resulting in the need to A lot of time to get enough output power problem

Method used

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Embodiment Construction

[0021] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a system configuration of an automatic choke device according to an embodiment of the present invention. In this figure, an engine 1 is used as a driving source of a generator. The engine 1 is provided with a temperature sensor 2 for detecting engine temperature. The temperature sensor 2 is provided, for example, on the cylinder head 2a. Also, a spark plug 3, an intake valve 4 and an exhaust valve 5 are provided on the cylinder head 2a.

[0022] A carburetor 7 is connected to an intake pipe 6 provided with an intake valve 4 . The carburetor 7 has a throttle valve 8 disposed downstream and a choke valve 9 disposed upstream thereof. The throttle valve 8 is opened and closed by driving a stepping motor 10 , and the choke valve 9 is opened and closed by driving a stepping motor 11 .

[0023] The engine 1 is connected to a generat...

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PUM

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Abstract

The present invention provides an automatic choke device that performs precise choke control in accordance with the operating state of an engine. A throttle (8) and a choke (9) connected in series are arranged on the intake pipe (6), and the opening of the choke (9) is controlled by a stepping motor (11). The choke valve opening when the engine is started depends on the engine temperature. The stepping motor (11) is initialized on the fully closed side of the choke valve (9) when the engine starting power supply is turned on. Alternatively, it is judged whether the starting opening of the choke valve is close to fully closed or close to fully open, and if close to the fully closed side, the stepping motor (11) is initialized on the fully closed side, and on the other hand, if close to the fully open side, the Initialize the motor.

Description

technical field [0001] The present invention relates to an automatic choke device, and particularly relates to an automatic choke device capable of performing favorable air-fuel ratio control according to the temperature rise of the engine after starting. Background technique [0002] The automatic choke device used when the engine is started in a cold (low temperature state) controls the solenoid actuator (solenoid actuator) and the diaphragm that operate the choke according to the temperature detected by a temperature detection element such as a thermostat Actuator (diaphragm actuator). During cold start, the engine can be started smoothly by using the automatic choke device to control the air-fuel ratio to make the air-fuel mixture rich. [0003] For example, Japanese Patent Application Laid-Open No. 5-280425 discloses an automatic choke device that detects engine coldness when a sensor composed of a thermistor that outputs a detection signal corresponding to the cylinde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M1/08
CPCF02M1/08F02D41/067
Inventor 上村健二浅井孝一中村政史田村稔福岛友树
Owner HONDA MOTOR CO LTD
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